<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="script">P</mml:mi><mml:mi mathvariant="script">T</mml:mi></mml:math>-symmetry in honeycomb photonic lattices
Alexander SzameitPhysics Department and Solid State Institute, Technion, 32000 Haifa, IsraelMikael C. RechtsmanPhysics Department and Solid State Institute, Technion, 32000 Haifa, IsraelOmri Bahat-TreidelPhysics Department and Solid State Institute, Technion, 32000 Haifa, IsraelMordechai SegevPhysics Department and Solid State Institute, Technion, 32000 Haifa, Israel
2011lv
ABI
Аннотация
We apply gain and loss to honeycomb photonic lattices and show that the dispersion relation is identical to tachyons---particles with imaginary mass that travel faster than the speed of light. This is accompanied by -symmetry breaking in this structure. We further show that the -symmetry can be restored by deforming the lattice.
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